I received mine fro Vapor DNA a few hours ago.
It is well built and no oily smell. The threading is on par with most devices on the market today, but not up to the standards of higher end mods.
My major concern prior to purchasing was I am a mouth to lung vaper and prefer 1.2 - 1.6 ohm single coils at 14 - 18 watts and would I be able to successfully build i with a single coil.
After a wash and rinse I reassembled it (very easy) and made a 9/10 28 GA spaced coil running between opposite posts and it came out to 1.48 ohms. I made my standard coil on my Coil Master pulled it apart and pushed it back together. After mounting adjusted it so the coil ran over both air holes on the deck. Wicking was simple, think Kayfun, but with a shorter lower chimney.
Filling the tank was very easy. Five clicks of the juice control and unscrew the top.
I'm running the juice control half open with 70/30 VG/PG and no leaking, gurgling, or dry hits. I haven't tried filling with the juice control open. Only filled twice (a quarter tank for the first test and now full). Doubt I will as the juice control is very simple (5 clicks from fully open to fully closed).
My only complaint (minor) so far is the air flow, while adjustable only has detentes for fully open and closed. I'm currently running it 3/4 closed for the mouth to lung draw I like. It does stay but could be bumped off a bit either way.
Fully open it gives an airy draw I would describe (as a mouth to lung vaper) as a slightly restricted lung draw, slightly less air than subtank fully open. I did try it, but won't generally use it.
After two hours I do like it and will continue to us it and would recommend it.